<template>
    <div>
 <!-- 用户列表组件  面包些导航 -->
 <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/welcome' }">后台首页</el-breadcrumb-item>
    <el-breadcrumb-item >权限管理</el-breadcrumb-item>
    <el-breadcrumb-item>权限列表</el-breadcrumb-item>
  </el-breadcrumb>
 
  <!-- 卡片视图区域 -->
<el-card>
     <!-- 警告注意页面 -->
 <el-alert
 title="添加商品信息"
 type="info"
 show-icon
 :closable="false"
 center
 >
</el-alert>
<!-- 步骤条 -->
<el-steps :space="200" :active="activeIndex - 0" finish-status="success" style="margin: 20px 0;" align-center >
    <el-step title="基本信息"></el-step>
    <el-step title="商品参数"></el-step>
    <el-step title="商品属性"></el-step>
    <el-step title="商品图片"></el-step>
    <el-step title="商品内容"></el-step>
    <el-step title="完成"></el-step>
  </el-steps>
<!-- tabs区域 label-position="top"意思属性在输入框上面-->
<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
<el-tabs v-model="activeIndex" :tab-position="'left'"  :before-leave="beforeTableave" @tab-click="tabClicked">
    <el-tab-pane label="基本信息" name="0">
        <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name">
         </el-input>
        </el-form-item>
        <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addForm.goods_price" type="number">
         </el-input>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="addForm.goods_weight" type="number">
         </el-input>
        </el-form-item>
        <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number">
         </el-input>
        </el-form-item>
        <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader
            v-model="addForm.goods_cat"
            :options="cateList"
            :props="{ expandTrigger: 'hover',...cateProps }"
            @change="handleChange"></el-cascader>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品参数" name="1">
        <!-- 渲染表单的item项   有的没有就没有显示-->
        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
           <!-- 复选框组 -->
           <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="item" v-for="(item, i) in item.attr_vals" :key="i">{{ item }}</el-checkbox>
              </el-checkbox-group>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品属性" name="2">
        <el-form-item :label="item.aTTr_name" v-for="item in onlyTableData" :key="item.attr_id">
<!-- 复选框组 -->
<el-checkbox-group v-model="item.attr_vals">
    <el-checkbox border :label="item" v-for="(item, i) in item.attr_vals" :key="i">{{ item }}</el-checkbox>
  </el-checkbox-group>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品图片" name="3">
         <!--
             action 表示图片要上传到的后台API地址
             handlePreview 点击预览触发
             handleRemove 删除图片触发
             fileList 指定文件列表
             list-type 指定预览组件的呈现方式
            -->
        <el-upload :action="uploadURl" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
  <el-button size="small" type="primary">点击上传</el-button>
  <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
</el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容" name="4">
        <!-- 富文本编辑器组件 -->
        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
        <!-- 添加商品的按钮 -->
        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
    </el-tab-pane>
  </el-tabs>
</el-form>
</el-card>  
<!-- 图片预览 -->
<el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
  <img :src="previewPath" alt="" class="previewImg"/>
 </el-dialog>
</div>
</template>

<script>
    import _ from 'lodash'
    export default {
        data() {
            return {
                activeIndex: '0',
                //添加商品的表单数据对象
                addForm: {
                    goods_name: '',
                    goods_price: 0,
                    goods_weight: 0,
                    goods_number: 0,
                    //这是商品所属的分类数组
                    goods_cat: [],
                    //图片的数组
                    pics: [],
                    //商品的详情描述
                    goods_introduce: '',
                    attrs: []
                },
                //表单的验证规则
                addFormRules: {
                    goods_name: [{
                        required: true,
                        message: '请输入商品名称',
                        trigger: 'blur'
                    }],
                    goods_price: [{
                        required: true,
                        message: '请输入商品价格',
                        trigger: 'blur'
                    }],
                    goods_weight: [{
                        required: true,
                        message: '请输入商品重量',
                        trigger: 'blur'
                    }],
                    goods_number: [{
                        required: true,
                        message: '请输入商品数量',
                        trigger: 'blur'
                    }],
                    goods_cat: [{
                        required: true,
                        message: '请选择商品分类',
                        trigger: 'blur'
                    }],
                }, //存放商品分类列表数据
                cateList: [],
                //配置对象
                cateProps: {
                    label: 'cat_name',
                    value: 'cat_id',
                    children: 'children'
                },
                //动态参数列表
                manyTableData: [],
                //静态属性列表
                onlyTableData: [],
                uploadURl: 'https://lianghj.top:8888/api/private/v1/upload',
                //图片上传组件的headers请求头对象
                headerObj: {
                    Authorization: window.sessionStorage.getItem('token')
                },
                previewPath: '',
                previewVisible: false
            }

        },
        methods: {
            //获取所有商品分类数据
            async getCateList() {
                const {
                    data: res
                } =
                await this.$http.get('categories')
                if (res.meta.status !== 200) {
                    return this.$message.error('获取商品分类数据失败!')
                }
                this.$message.success('获取商品分类数据成功！')
                this.cateList = res.data
                    // console.log(this.cateList);
            },
            //级联选择器选中项变化会触发这个函数
            handleChange() {
                // console.log(this.addForm.goods_cat);
                if (this.addForm.goods_cat.length !== 3) {
                    this.addForm.goods_cat = []
                }
            },
            beforeTableave(activeName, oldActiveName) {
                // console.log('即将离开的标签页名字是' + oldActiveName);
                // console.log('即将到的标签页名字是' + activeName);
                // return false根据条件来组织跳转
                if ((oldActiveName === '0' && this.addForm.goods_cat.length !== 3) || this.addForm.goods_name === '') {
                    this.$message.error('请先选择商品分类！或者填写商品名称')
                    return false

                }
                this.$message.success('切换成功')
                return true
            },
            async tabClicked() {
                // console.log(this.activeIndex);
                //等于1证明访问的是动态参数面板
                //还只能写sel 不是attr_sel
                if (this.activeIndex === '1') {
                    const {
                        data: res
                    } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                        params: {
                            sel: 'many'
                        }
                    })
                    if (res.meta.status !== 200) {
                        return this.$message.error('获取动态参数列表失败')
                    }
                    // res.data.forEach(item => {
                    //     //用三元表达式判断改变 赋值为数组
                    //     item.attr_vals = item.attr_vals.length === 0 ? [] :
                    //         item.attr_vals.split('')
                    // })
                    res.data.forEach(item => (item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')))
                    console.log(res.data);
                    this.manyTableData = res.data
                }
                //等于2访问的是静态属性面板
                else if (this.activeIndex === '2') {
                    const {
                        data: res
                    } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                        params: {
                            sel: 'only'
                        }
                    })
                    if (res.meta.status !== 200) {
                        return this.$message.error('获取静态属性失败')
                    }
                    // res.data.forEach(item => {
                    //     //用三元表达式判断改变 赋值为数组
                    //     item.attr_vals = item.attr_vals.length === 0 ? [] :
                    //         item.attr_vals.split('')
                    // })
                    res.data.forEach(item => (item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')))
                    this.onlyTableData = res.data
                    console.log(onlyTableData);
                }
            },
            //处理图片预览处理效果
            handlePreview(file) {
                // console.log(file);
                this.previewPath = file.response.data.url
                    //处理预览完了就把预览打开
                this.previewVisible = true
            },
            //点击关闭图标事件
            handleRemove(file) {

                // 获取将要删除的图片的临时路径
                // 从pics数组中 找到这个图片对应的索引值
                // 调用数组的splice方法 把图片信息对象从pics数组中移除
                const filePath = file.response.data.tmp_path
                const i = this.addForm.pics.findIndex(x => x.pic === filePath)
                this.addForm.pics.splice(i, 1)
                console.log(this.addForm);
            },
            //监听图片上传成功的事件
            handleSuccess(response) {

                //第一步拼接一个图片信息对象
                const picInfo = {
                        pic: response.data.tmp_path
                    }
                    // 二将图片信息对象push到pics数组中
                this.addForm.pics.push(picInfo)

            }, //添加商品
            // add() {
            //     this.$refs.addFormRef.validate(async valid => {
            //         if (!valid) {
            //             return this.$message.error('请填写必要的表单项！')
            //         }
            //         //执行添加的业务逻辑
            //         const form = _.cloneDeep(this.addForm)
            //         form.goods_cat = form.goods_cat.join(',')

            //         //处理动态参数
            //         this.manyTableData.forEach(item => {
            //                 const newInfo = {
            //                     attr_id: item.attr_id,
            //                     attr_value: item.attr_vals.join(' ')
            //                 }
            //                 this.addForm.attrs.push(newInfo)
            //             })
            //             //处理静态属性
            //         this.onlyTableData.forEach(item => {
            //             const newInfo = {
            //                 attr_id: item.attr_id,
            //                 attr_value: item.attr_vals
            //             }
            //             this.addForm.attrs.push(newInfo)
            //         })
            //         form.attrs = this.addForm.attrs
            //             //发起请求添加商品
            //             //商品的名称必须是唯一  
            //         const {
            //             data: res
            //         } = await this.$http.post('goods', form)
            //         console.log(res)
            //         if (res.meta.status !== 200) {
            //             return this.$message.error('添加商品失败!')
            //         }
            //         this.$message.success('添加商品成功!')
            //         this.$router.push('/goods')
            //     })
            // }
            add() {
                this.$refs.addFormRef.validate(async valid => {
                    if (!valid) {
                        return this.$message.error('请填写必要的表单项')
                    }
                    // 执行添加的业务逻辑
                    const form = _.cloneDeep(this.addForm)
                    form.goods_cat = form.goods_cat.join(',')
                        // 处理动态参数
                    this.manyTableData.forEach(item => {
                            const newInfo = {
                                attr_id: item.attr_id,
                                attr_vals: item.attr_vals
                            }
                            this.addForm.attrs.push(newInfo)
                        })
                        // 处理静态参数
                    this.onlyTableData.forEach(item => {
                        const newInfo = {
                            attr_id: item.attr_id,
                            attr_vals: item.attr_vals
                        }
                        this.addForm.attrs.push(newInfo)
                    })
                    form.attrs = this.addForm.attrs
                        // console.log(form)
                        // 发起请求添加商品数据
                        // 商品的名称必须是唯一的
                    const {
                        data: res
                    } = await this.$http.post('goods', form)
                    console.log(res)
                    if (res.meta.status !== 201) {
                        return this.$message.error('添加商品失败!')
                    }
                    this.$message.success('添加商品成功!')
                    this.$router.push('/goods')
                        // 不能直接做转换因为在 级联选择器 中双向绑定了 goods_cat 作为key
                        // this.addForm.goods_cat = this.addForm.goods_cat.join(',')
                })
            }
        },
        created() {
            this.getCateList()
        },
        computed: {
            cateId() {
                if (this.addForm.goods_cat.length === 3) {
                    return this.addForm.goods_cat[2]
                }
                return null
            }
        }
    }
</script>


<style lang="less" scoped>
    .el-checkbox {
        margin: 0 10px 0 0 !important;
    }
    
    .previewImg {
        width: 100%;
    }
    
    .btnAdd {
        margin: 16px 0 0 0;
    }
</style>